Door lock or locking device for doors, windows, and the like



F. TVETEN DOOR LOCK OR LOCKING DEVICE FOR DOORS, WINDOWS, AND THE LIKE Filed Sept. 1'7, 1938 I E rm Wat: 1w

Juvenfov zdmmw MW Patented Apr. 15, 1941 OFFICE DOOR LOCK OR LOCKING DEVICE FOR DOORS, WINDOWS, AND THE LIKE l inn Tveten, Oslo, Norway Application September 17, 1938, Serial No. 230,474 In Norway June 1, 1938 1 Claim.

spring, co-operates with suitable locking and re- A leasing parts of the lock in such a manner, that the latch always remains inv an unlocked position when the door, etc., is open, and can be brought into locking position only by the door,

etc., being pressed against the door-frame when being closed.

A further feature of the invention is, that the locking latch has such a shape, that it, when being in locking position and thereby engaging with a cavity in the door-frame, through a wedge effect against the one side of the cavity forces the door, etc., against the bearing surface of the door-frame.

Other features of the invention will appear from the following description of an embodiment of the device.

In order to describe clearly my invention I will refer to the accompanying diagrammatical drawing, wherein:

Figure 1 shows a part of the door seen from the edge (in the direction I-I in Figure 2) with the locking device in looking position.

Figure 2 is a sectional View on the line 11-11 in Figure 1.

Figure 3 is a sectional view on the line III-III in Figure 2.

The door is indicated by l and the door-frame by 2. In the edge of the door there is provided a cavity l, in which the locking device is placed.

On the shaft 3 of the door-handle a disc or the like 4 is pivoted serving as a locking latch. Transversely from the shaft 3 projects a pin 5, which when the door-handle is operated for opening the door, engages with the upper edge of a transverse slit in the boss l2 attached to the latch 4. During the turning of the handle therefore the latch 4 will be turned into the position as shown in Figure 2 with chain lines, in which position the locking device is opened. In this way a spring 1 is flexed, and the spring consequently tends to turn the latch 4 to the right in Figure 2. In the position as shown this turning, however, is prevented by means of an arresting device 8, for instance a plate spring or the like, arranged in the cavity 1' of the door,

a cam l3 on the plate spring engaging with a notch I4 in the lower edge of the latch.

The door-frame is provided with a suitable projection 9 being arranged to co-operate with the arresting device 8 and thereby releasing the same. The projection 9 is placed and shaped in such a manner, that the releasing takes place only just before the moment when the door is quite closed in the door frame 2, the projection 9 being arranged to pass through a slit [5 in the edge of the door. At the same moment as this releasing takes place, the latch 4 owing to the spring I is turned to the right, and the edge H) of the latch engages with a cavity II in the door-frame. As it most clearly will appear from Figure l, the edge ll] of the latch has the shape of a wedge, and consequently the door will be pressed the more closely into the door-frame the more the wedge-shaped edge ii] is pressed into the cavity II. If the door and the door-frame respectively is provided with weather stripping of rubber or other suitable material, it is possible in this way to obtain an entirely tight closing of the door. Vibrations of a closed door, for instance a motor-car door, will result in the spring tending to pull the edge ID of the latch still more closely into the cavity l I. Consequently the rattling of the door if exposed to vibrations is avoided.

I wish it to be clearly understood, that different embodiments of my above described device are possible without departing from the spirit of the appended claim.

It is obvious that the locking device of the present invention can be employed in association with a key.

I claim:

A latch for a body having a door opening and a recessed swinging door adapted to fit within said opening, one edge of the body portion defining the door opening being provided with a recess, comprising an element rotatably mounted within the recess of the door for rotation in the plane of the door, said rotatable element being of a shape substantially conforming to a sector of a disc, the peripheral edge thereof being wedge shaped to cooperate with the recess in the body to effect a latch, means constantly urging said element into latching position, means for manually retracting said element to a position wholly within the recess in said door, a notch in the lower radial edge of said element, a leaf spring having a projection thereon, said spring being attached to the door, lying wholly within the recess thereof and acting in a direction parallel and passing through the arc of travel of said element as the door is moved into closed position, the pin and leaf spring remaining in coni tact while the door is closed, whereby the sector will be constantly resiliently urged against a portion of the body defining the recess therein to prevent rattles.

FINN TVETEN. 

